Rotary pump.



WQ G. HAWLEY.

} ROTARY PUMP.

} APPLICATION TILED APR.8.1914.

3 SHEBTSSHEET l.

Patented Feb. 23

mwwm,

wuewtoz W, G. HAWLEY. ROTARY PUMP. APPLIOATION FILED APR. 8 1914.

j Patented Feb-Q 23, 11915.

Q Emm W; G. HAWLEY. 'RO'IARY PUMP. APQLIQATION FILED APR. 8, 1914.

' Patented Feb. 23, 1915.

a SHEETS-SHEET 3.,

1/4/440 5W wwjm w' WILLIAM G. HAWLEY, or ELMIBA, NEW YORK; assrsnoaro AMERICAN La FRANCE rmn ENGINE COMPANY, 11m, or ELMIRA, NEW YORK, A conronn'rronor NEW" YORK.

f To all whom it may concern Be it known that 1, WILLIAM G. HAWLEY,

a citizen of the United States, and resident of Elmira, county of Chemung, and State of New York, have invented certain new.

and useful Improvements in Rotaryv Pumps, of which the following is a full and clear specification.

' register with each This invention relates to rotary pumps, its primary object being to'provide an in 1- proved construction for a pump" of this character by virtue of which the flow of fluid (such for-example as water in fire engine pumps) will be facilitated and grad I uallyaccelerated.

One of the objects ofthe presentinven-tion is to simplify the construction of. the pump housing by making it in few parts and proyiding securing means. which at the same time serve to bring the parts into proper other prior to being fastened. I

Other and more specific objects willappear'in the claims, reference being had to the accompanying drawings which exem- 'plify my invention, in its application to a fire engine pump.

In the drawings,-Figure 1 .is a side elevation of one embodiment of my invention; Fig. 2 is a top plan View of the same; Fig.

' 3 is an end elevation of the same; Fig. 4

is a section on the line IVIV, Fig. 1; Fig.

is a side elevation-similar to Fig. 1\with the nearer side wall portion removed; Fig. 6 is a similar side elevation with the gears removed.

struction for rotary pumping elements 1 and 2, provided with portions 3 which intel-mesh. Said rotary pumping elements are preferably intermeshing gears", one of which serves to drive the other. In the resent instance, 2 isthe driving gear, keys to the ROTARY rumr.

specification of Letters Iatent.

Patented Feb. 23, iaia.

Application filed April 8, 1914. Serial No. 830,476.

- shaft #t which as shown in Fig. 2, extends beyond the wallet the housing and isprovided with" a keyw'ay slot 5 adapted to receive a suitable gear or pulley for driving the same. As shown in the several views, the housing comprises a central shell. 6 which, as shown in Figs. 5 and 6, provides a suction chamber 7 and a pressure chamher 8, the walls ofsaid 'shell being conformed .to the peripheries of the gears l and 2. The bottom wall 9 of'the shell 6 is sloped downwardly from the ends toward the center of the suction chamber 7 to form a depression 10 on either side of an inwardly protruding boss 11 which extends throughout the wall of the shell and is provided with a hole 12 which is reamed to provide a finished bearingsurface so that the bolt which is also provided with a finished outer surface to fit the hole 12, is adapted when inserted therein to accurately determine the position of the side wall portions of the housing. with respect to the central shell. Said wall 6 is of substantially the same width as the gears l and 2 and is provided on its opposite lateral faces with'fianges l3, havin,g'spaced holes 14 for suitable bolts or other fastenings which serve to secure the side wall portions thereto. The upper wall of the shell 6 is alsoprovided with reamedholes 15 similar. to the hole 12 and for the same purpose. A- fluid conveying gallery 16 surmountsthe shell 6-and is provided with branches .17 extending toward .opposite. ends of the housing. Pressure chamber 8 opens into the gallery 16.

. Referring more especially to Figs. 3 and 4., it will benoted that each of the side wall portions are providedwith attaching flanges 18 which are secured to the flanges 13 of the central shell 6. Furthermore, it will be noted that each of the side wall piirtions are provided with recesses 19 below the plane of the axes of rotation of said pump elements, said recesses conforming in general contour with the suction chamber 7 and in effect making such suction chamber of con- "siderably greater width than said pumping elements. Suitable bearings 20 for the pumping elements are provided in the side her 7 and terminating under the bearings 20.

i I construct each of the inlet shells 23 in the Said partitioiis 21 form between them and the of theinlet shells 23 comprises branches 24 which communicate respectively with the are deflected inwardly at 25 for the purpose of deflecting the incoming fluid toward the rotary-pumping elements. Preferably I orm are Y-shaped casting provided with a flange 26 which, may be secured to the flanges 27 ,at either end of the housing.

annel 22- A shown y tted lines .in Fig 2, the outer walls of the channels 21 Above'the plane of the rotary axes, the sidewall portionsare provided with recesses 28 whi h constitute extensions to the pressure chamber Sand make such pressure chain ber'in effect bf greater. width than the rotary gears 1 and 2. In order, however, to1-grad ually,,restrict the fluid to the dimensions of the gallery 16 the width of the pressure chamber, as shown in Fig. 4, is less-lthan the width of the suction chamber 19, Above the plane of axes each of the side wall portions is provided with a flat wall 29 which extends inwardly. toward the pressure chamufiqand is in substantial, contact w1ththe- "sidefacosof the gearsl and 2 in their travel above.,.-Said plane. Extending between the flatsurfaces 29. and

with is the bridge. .30 in each side wall poron the same .levelthere tion, said bridges serving to prevent the flee to ,the suction chamber. I

ide wall portions,

y. en

vld'ethe inflowing, .jtive branches 24 leading to the channels 22.

Referring now to Figs. 1, 3 and 4-, it will ments provided with the spaces between saidbescen that a plurality of stifiening -ribs- 31, are provided on the outer forming a V opening upwardly and extending, across the suction and pressure chambers, The legs of the V are proximately tangent to the afi'orded materialsupport and at thesame time serving to stiffen said bearings. Preferably, the bosses which contain the reamed holes;l2 and 15 are.disposed at the apex andilppei; ends of the ribs 31 respectively.v

The bolts 32. which extend through the holes 12and l4: and serve to hold the side wall portionstdthcentral shell'6 are finished to fit exactly the holes 12-and 15, being there-.

ed to se TYe Ias dowels for locating the side wall portions with respect to the ner, 33 in each of theinlets 23 serves to dicurrent into vthe respecwalls of the said ribs preferably preferably ap-- bearings 20 of the rotary pumping elements, being thereby central shell '6. As shown m- Fig. 3 a cor-v ments and with inlet passages said delivery chamber, and means for sup plying fluid to said suctionchamber through the opposite lateral wallsjoi said pump housing, said rotary pim ing element being rotatable on an axis extending transversely to said lateral walls, said pump eleiheiit, being provided with oppositely dis- --p'bsd,beariiigs, the Walls of which are ex- :posed to thecooling effects of the fluid entering from the opposite sides respectively.

2. In a pump, a pair of piimping elements rotatable about parallel axes, said pumpingelements having inter-meshing portions, a housing for said pumpingelements providedwith suction and delivery chambers respectively on opposite sides of the line of centers of rotation of said pumping elements, said suction chamber being provided with a'recess extendin laterally from one sideofsaid pumping elements and in open communication therewith, and a suction pipe "for supplying fluid to said recess.

3. In a pump, a pair of pumping elements rotatable, about parallel axes, said pumping elements having intermeshing portions,

a. housing for said pumping elements provided with suction and delivery chambers disposed respectively on opposite sides of theline of centers of said rotary pumping elements, said suction chamber being pro vided with recesses extending laterally from .both sides of said pumping elements, and a f'suction pipe provided with branches leadto said recesses respectively.

of water from the pressure chamberback A In a pump having rotary pumping eleintermeshing portions,

portions constituting fluid conveying chambers, a housing for said pum ing elements. provided with suction and eliverychambers, said suction chamber beingof greater width than said pumping elements and 'branches communicating with said suction chamber from opposite sides thereof.

a suction pipe provided with 5. In a pump, a pair of rotary intermeshing pumping elements, a housing therefor having suction and pressure chambers of greater width than said pumping elements, said housing-being provided with walls adjacent the lateral faces of said pumping elements and with ihletpassages for fluid arranged outside said walls and communicating respectively with opposite sides of said ,suction chamberj 6. In a pump, a pair of rotary interme'shing pumping elements, a housing therefor having suction and pressure chambers of greater width than said pumpin elements, said housing bein provided with walls adjacent the lateral aces of said pumping elerang'ed outside said walls and communieating respectively with opposite sides of said suction chamber, and a common inlet pipe for said passages.

for fluid aring pumping e having suction and pressure chambers of greater width than said pumping elements,

said housing.

meaoai 7. a pump a pair of rotary intermeshlements, a housing therefor said housing being provid'ed with walls adjacent the lateral faces of said pumping elements and with inlet passages for fluid arranged outside said walls and communicating respectively with opposite sides of said I suction chamber, and a common inlet pipe for said passages, arranged at each end of 8. In a pump, intermeshing pumping ele ments rotatable on parallel axes, a housing for said pumping elements providing suction and pressure chambers respectively on opposite sides of theplane of said axes, the side walls of said suction chamber being spaced from the lateral faces of said pump ing elements, said suctionchamber being provided with partitions adjacent the side faces of said pumping elements, said partitions forming inlet passages I extending from one end of the pump housing along the side 'faces of said pumping elements, and

means for conveying fluid to said passages. 9. In a pump, intermeshing pumping eleinentsrotatable on parallel axes, a housing for said elements providing suction and pressure chambers on opposite sides of the plane of said axes, said housing being provided chamber between said pumping elements and i with inner walls in substantial contact with the walls of said elements and extending from said pressure chamber to adjacent to said plane,'the lateral walls'of said suction chamber being spaced from said elements, partitions arranged within said suction the lateral walls of the suction chamber to provide fluid channels parallel to'the side walls of said pumping elements, and an inlet provided with branches respectively communicating with said channels.

10. In a-pum-p, intermeshing pumping elements rotatable on parallel axes, a housing for said elements providing suction and pressure chambers on opposite sides of the plane of said axes, said housing belng provided with inner walls in substantial contact with the walls of said elements and extending from said pressure chamber to ad jacent to said plane, the lateral walls of said suction chamber being spaced from said elements, partitions arranged within said suction chamber between said pumping elements and the lateral walls of the suction chamber to provide fluid channels parallel to the side walls of said pumping elements, and an inlet provided with branches respectively communicating with said channels, said partitions being arranged to extend from adjacent to a vertical plane parallel to and intermediate of said axes and toward opposite ends of said housing 11. In a pump, intermeshlng pumping elements rotatableon parallel axes, a housing for said elements providing suction and pressure'chainbers, on opposite sides of the planesof saidaxes, said housing being provided with inner walls in substantial contact with thewalls of-said elements and extend ing from said pressure" chamber to adjacent to said plane, the lateral wallsof said suction chamber being spaced from said elements, partitions arranged within said suction chamber between said pumping elements and the lateral walls of the suction chamber to provide fluid channels parallel to the side walls of said pumping elements, and an inlet provided with branches respectively communicating with said channels, said par-' titions being arranged to extend from. adj acent to a vertical plane parallel to andintermediate of said axes and toward opposite ends of said housing,the inner walls of said partitions being spaced farther apart than said contacting walls.

' 12. In a pump, intermeshing pumping elements rotatable on parallel axes, a houslng for said elements proi-ided'with suction and pressure chambers respectively disposed on opposite sides of the plane of said axes,

said suction chamber being of greater width than .said'elements and said housing being provided with inlet channels extending from said suction chamber toward one end of said housing and outside of said pump ing elements.

13. In a pump, intermeshing pumping ele ments rotatable on parallel axes, a housing for said elements provided with suction and pressure chambers respectively disposed on opposite sides of the plane of said axes, said suction chamber being of greater width than said elements, and said housing being provided with inlet channels extending from said suction chamber towardfone end of said --h0using and outside of said pumping elements, said channels being arranged inter- 'mediately of said plane and a plane tangent to the peripheries of said pumping elements.

14:. In a pump, intermeshing pumping elements rotatable on parallel axes, a housing for said elements provided with suction and pressure chambers respectively disposed on opposite sides of the plane of said axes,

said suction chamber being of greater width lot = said elements,

said housing providing suction and pressure chambers extending across its entire Width, said chambers being arranged on opposite sides of the lane of said axes, said housing being provi ed with walls in contact with said elements and extending from said pressure chamber in op posite directions toward said plane inlets at? opposite ends of said housing, and partitions arranged in said suction chamber adjacent the lateral faces of said pumpingelements to provide channels extending from said inlets toward that portion of thesuction chamber lying beneath the intermeshing portions of said pumping elements.

16. In a pump, 'intermeshingpumping olements rotatable about parallel axes, a housing for said elements of greater width than said-elements, said housing providing suction and pressure chambers extending across its entire width,.said chambers being arranged on opposite sides of the plane of said axes, said housing being provided with i walls in contact with said elements and extending from said pressure chamber in opposite directions toward said plane, inlets at, opposite ends of. said housing-and partitions arranged in said suction chamber adjacent the lateral faces of said pumpin elements to provide channels extending rom said inlets toward that portion of the suc-' tion chamber lying beneath the intermeshing portions of said pumping elements, said partitions being arrangedon both sides of the pumping elements and saidinlets having forked branches communicating respectively with the channels formed by said partitions. v c

, 17, In a pump, intermeshing pumping elementsrotatable about parallel axes, a housing for said elements of greater width; than said elements, said housing providing suction and pressure chambers extending. across its entire width, said chambers -be1n arranged on opposite sidesof the plane 0 said axes, said housing being provided with Walls in contact with said elements and extending from said pressure chamber in opposite directions toward said plane, inlets at opposite ends of said housing, and partitions arranged in said suction chamber adjacent the lateral faces of said pumping elements to provide channels extending from said inlets toward thatportion of the suction chamber lying beneath the intermeshing portions of provide channels extending being rotatable abou leading adjacent the side walls of said gears, said I when l 18. In a pump, intrmeshin pumping ele ranged on opposite sides of the plane 0 said axes, said il-l'dusiiig being'provided with walls in contact with said elements and extending from said pressure chamber in opposite directions toward said plane, inlets at opposite endsof. said housing, and partitions arranged-in said suctionchamber adjacent the lateral faces of said pumping elements to from said inlets toward that portion of the suction chamber lying beneath the intermeshing portions of said pumping elements, said partitions being arranged 011 both sides of the pumping elements and said inlets having forked branches communicating respectively with the channels formed by said partitions, said suction chamber being provided with a central depression and said inlets being arranged adjacent said plane, 'said channels being inclined downwardly toward said central depression, andthe outer Walls of said channels being deflected inwardly toward said central depression.

19. In a pump, intermeshing pumping elements rotatable about parallel axes, a housing for said elements of greater width than said elements, said housing providing suction and pressure chambers extending across its entire width, said chambers being arranged on opposite sides of the plane of said axes, said housing being provided with walls in contact Withsaid elements and extending from said pressurechamber in opposite directions toward said plane, site ends of said-housing, and partitions arranged in said suction chamber adjacent the lateral faces of said pumping elements to provide channels'extending from said inlets toward that portion of the suction chamber inlets at oppolying beneath the intermeshing portions of said pumping elements, said partitions being arranged on both sides of the pumpin elements and said inlets having forke branches communicating respectively with thechannels formed by said partitions, said pumping elements being provided with journals and bearings therefor, the walls of said bearings constituting portions of the walls of said channels to cool said bearings. 20. Inapump, intermeshing gears which constitute the pumping elements, said gears parallel horizontal axes, a housing for saidgears providing a suction chamber below the plane of said gears and a pressure chamber above said plane, said suction chamber being of greater width than said gears and having inlets from opposite ends of said housin pressure chamber being of greater width than said gears to permit the discharge of fluid laterally from the chambers formed between intermeshing teeth but ofless width than said suction chamber to provide a graded reduction in spacefor elevating the a pressure in said pressure, chamber, the lateral Walls of'said housing being provided I with bridges separating said chambers.

21. In a pump, the combination with intor-meshing gears constituting the pumping. elements, said gears being rotatable about parallel axes, of a housing for said rotary pumping elements comprising a central shell of substantially the same width and'connforming totheperipheries of said gears and providing suction and pressure chambers on -opposite sides of the plane of said axes, side wall portions for closing the sides of said central shell, said shell and. side wall portions being provided with bolt holes having finished bearing Walls, and bolts extending through said holes and having finished surfaces, contacting with the finished Walls of said holes topositively hold said side wall portions in accurate register with said-con tral shell. I 1 r 22. In a. pump, the combination with intermeshing gears constituting the pumping elements, said gears being 'rotatable about parallel axes, of a housing-for said rotary pumping elements comprisinga central shell of substantially the same 1 width and conforming to the peripheries of said gears and providing suction and pressure chambers on opposite. sides-of the plane of 'Sald gears side wall portions for closingthe sides of said central shell, said shell and side wall' portions being provided with bolt holes havving finished bearing walls, and bolts extend-- ing through said holes and having finished surfaces contacting with the finished walls of said holes to positivelyhold said slde wall portions in accurate register with said central shell, said side wall portions being provided with depressions registering with and forming extensions to. said suctlon and pressure chambers. I 23. In a pump, the combination with 1ntermeshing gears constituting the pump ng elements, said gears being rotatable about parallel axes, of a housing for'said rotar pumping elements comprising a central she I of substantially the same width. and conforming to the peripheries of said" gears and providing suction and pressure chamberson opposite sides of the plane ofsa 1d axes, side wall portions for closing the s1des of said central shell, said shell and side wall portions beingv providedwith bolt holes hav ng finished bearing walls, andboltsextendlng through said holes-and having fimshed surfaces contacting with'the fimshed walls of saids holes to positively hold said side wall tt'portions in accurate register with said cen-' tral shell, said side wall. portions being pro vided with depressions registering with and forming extensions to said suction and pressure chambers, portions of said .side wall portions intermediate to said recesses being leftintact to provide bridges between said chambers 24. In a pump, the combination with in-,-

termeshing gears constituting the pumping elements, said gearsbeing rotatable "about parallel axes, of a housing for said rotary pumping-elements comprising a central shell of substantially the same'width and con- I finished bearing Walls, and bolts extending through saidholes and havin finished surfaces contacting with the finished walls of said holes to positively hold said sidewall portions inaccurate re ister with said central shell, said side wal portions being ro .vided with reinforcing ribs extending rom the bolt holes above said plane of thebolt holes below said plane.

25. In a.- pump, the combination with inter-meshing gears constituting the pumping elements, said gears being rotatable about parallel axes, of a housin for said rotary pumping elementscomprismg a central shell the axes to of substantially "the same width and conforming to the peripheries of said gears and providing suction and pressure chambers on vided with bearings for said rotary pump- -.ing elements and with stifiening ribs exopposite sides of the plane of 'said'axes, side l tral shell, said sidewall portions being prov tending from said bearings across the lateral walls of said-suction and pressure chambers.

26.,Infa pump, the combination with intermesh'inggear's constituting the pumping elements, said ears sing rotatable about parallel axes, o a housing ,for said rotary pumping elements comprising a central shell of substantially-the same width and'conforim ingito the peripheries of said gears and prov1 ng suction and pressure chambers on o posite sides of the plane of said axes, si e wall portions for closing the sides of said central shell, said shell and side wall portions being provided with bolt holes havin finished bearing walls, and bolts extending through said holes and having finished surfaces contacting'with the finished walls of ,1. eqai shaped enlargement on each of said side wall portions, the open end of the V being 10 arranged on the outer Wall of the pressure chamber.

' v WILLIAM- G. HAWLEY. Witnesses:

G. J. NA Y K. J. Wdfiims. 

